Steam-boiler



UNITED STATES PATENT 'EEICE sYLvEsrEE L. LANGDON. vou NEW ORLEANS, LoUIsIANm;

ffsTE-AM-BolLER.

, SPECIFICATION forming peri; afnemers Patent No. 224,447, dated February 1o, 1880.

l Appneeuon nieu November 15is19.

To all whom it may concern: Y i

Be it known that LSYL'VESTER L. LANGdjON, of the city of New Orleans, parish of Orleans, and State of Louisiana, have invented certain new and useful Improvements in Steam-Boilers, of which the following is a'specication.`

The object of this invention is to prevent foaming and priming in steam-boilers; and to this end the invention consists in the combination, with a main boiler, of an auxiliary boiler, which is connected with the water and steam spaces of the main boiler, and is furnished with suitable stop-cocks for opening and closing communication from said auxiliary boiler toY the water and steam spaces ofthe main boiler,

whereby the greaterpressure of steam inthe' auxiliary boiler can be discharged, Vwhen required, into the main steam-boiler having. less steam-pressure, forcing the foaming-Water in the latter down to its lowest possible level, while increasing the workin g volume of steam and permitting only dry steam to escape through the steam-pipe from the main boiler, and at the same time preventing foaming Ain the latter, owing to the foam being forced down by the greater pressure of steam from the auxiliary boiler, Vthus lessening the danger of burning or explosion.

In the accompanying drawings, Figur-e1 represents a sideelevation, partly in section, of a boiler provided with my invention; and

i Fig. 2 is a transversesection of the same on line x .fr of Fig. l.

Referring tov the drawings, the letter A indicates a boiler, which may be of any known construction, either locomotive or stationary, and B indicatesthe usual steam-dome.

The auxiliary boiler is in the present instance arranged within the main boiler, and it con-l sists of the upper and lower horizontal pipes or cylindrical chambers, C D, connected by three or more intermediate pipes, F F. The` outer ends of the horizontal pipes C and D are attached to the head of the main boiler by flanges and rivets or bolts and screws, .and the lower one, D, of the horizontal pipes is the water-pipe, and at its outer end it is connected with the water-space of the main boilerby` means of a connecting-pipe or water-passage, G, which isfurnished with a Isuitable stopcock, H, for opening and closing communication betweenv said waterspace of the main boiler and the lower pipe, D, to admit water `to the latter. The upper horizontal pipe `or chamber, C, projects through the head of the main- -the steam-space of the main'boiler.

The operation of the auxiliary boiler is as follows: vThe. steam generated iu the pipe or chamber D passes through the connectingpipes F to the Lipper horizontal pipe or steamdrum, O and I, and is there held by reason of Vthe valvesll and L being bothclosed until the steam-pressure increases five or ten pounds, more or less, to the Vsteam-pressure inthe main boiler. The pressure in the auxiliary boiler having been .raised to the required point, the valvey or cock L, is opened, and the increased pressure of steam in the auxiliary boiler escapes through the steam-pipe J into the main steampipe K, thereby causing the foaming water in the main boiler to be forced downto its lowest level by reason Vof the higher pressure being discharged onto the lower pressure of steam, thereby avoiding foaming while increasing the Working volume of steam,Y and at the same time preventing priming.

The increased volume of steam'in the main boiler can be maintained at will by closing the valves H and L and Vafterward opening valve L at the required intervals to admit a supply of the higher-pressure steam to the main boiler until the pressure in the two boilers is equalized, and when such is accomplished the valve E is opened and a supply of water Vfrom the water-space of the main boiler admitlted to ,the pipe or chamber D of the auxiliary `boiler through the connecting water-pipe G.

foam, and permitting nothing but dry steam to escape to the cylinders, thus preventing prim- 1n g.

I have illustrated and described the auxiliary boiler as arranged within the main boiler; but it is evident that it ma7 be connected to the outside ofthe same, or be located at a suitable distance. therefrom.

Having fully described my invention, what I claim isl. The colnbination, with a main boiler, of a supplementary boiler arranged within saidF main boiler, a pipe connecting the water-spaces, and another pipe connecting the steam-spaces, of said boilers, each of said pipes being provided with a stop-cock, by which the passage of steam and water from one boiler to the other may be controlled, substantially as set forth.

2. The combination, witliamain steam-boiler, of an auxiliary boiler consisting of two pipes or chambers, C D. intermediate connectingpipes, F, and pipes G and J, connecting the said pipes or chambers, respectively, with the waterspace and the steam space of the main boiler, for discharging steam ofa high pressure into steam of a lower pressure iu the main boiler, substantially as and for the purpose described.

3. -The combination, with the main steamboiler, of the auxiliary boiler arranged within the same, and consisting of two horizontal pipes or chambers, C and D, intermediate connecting-pipes, F, vertical steam-drum I, steampipe J, connecting said drum with the steamspace of the main boiler, and the water-pipe G, connecting` the lower pipe, D, with the wateri space of the main boiler, said pipes G and J being provided with valves H and L, all sub' stantially as and for the purpose described.

To the above I have signed my name this 11th day of October, 1879.

v S. L. LANGDON. Witnesses:

FRANCIS M. FIsK, W. L. POOLE. 

